Releasable setting tool and by-pass



March 14, 1944. R. BASSINGER RELEASABLE SETTING TOOL AND BYPASS Filed Sept. 23, 1940 4 Sheets-Sheet 1 Wm M mew 5 T M m 5 5 w r F i \Y\\\\\\\\\\ m WWI v 4 m w a k .A\ \Q\\ z N vw:

March 14, 1944. R. BASSINGER 2,344,121

RELEASABLE SETTING TOOL AND BYPASS 7 Filed Sept. 23, 1940 4 Sheets-Sheet2 so l0-- 52 14. 5O l5 4& 1i

i? of a 41 45 1' '-I6 60 %"l8 I as 8 $3.

March 14, 1944. R, BASS NGER 2,344,121

RELEASABLE SETTING TOOL AND BYPASS v Filed Sept. 23, 1940 4 Sheets-Sheet 3 March 14, 1944. R; BASSINGER 7 2,344,121

RELEASABLE SETTING TOOL AND BYPASS Filed Sept. 25', 1940 '4 Sheets$heet 4 lllllil IIII/ Patented Mar. 14, 1944 UNITED STATES. PATENT OFFICE RELEASABLE SETTING TOOL AND BY-PASS Ross Bassinger, Houston, Tex.

Application September 23, 1940, Serial No. 357,905

9 Claims.

This invention relates to new and useful improvements in a releasable setting tool and .bypass.

In many instances in oil .field practice, particularly in fields having a deep producing horizon, it has been found advantageous to cement or seal 01f certain portions of a well bore. The sealing off operation may be performed in various difierent ways. The object of the sealing or cementing operation is usually to seal off certain stratum or strata-from other stratum or strata, or from the well bore. It is customary to use a well plug, or cement retainer, to hold the sealing cement in place while it hardens or sets. Such a well plugis disclosed in my co-pending applications, Serial No. 292,029, filed August 26, 1939, which became Patent No. 2,230,447, issued February 4, 1941; Serial No. 333,584, filed May 6, 1940; and Serial No. 353,990, filed August 24, 1940.

The setting tool disclosed in the present application is particularly adapted for use with Well plugs of these types, but may be utilized in various other modes.

After the sealing cement has been forced downwardly through the tubing string, and delivered below'the well plug, as is the usual case, the tubing remains partially filled with cement. Some means is necessary to wash down or clean the tubing of the cement present therein.

In addition, with well plugs of the type disclosed in my co-pending applications, hereinbefore referred to, it is necessary to provide some means for disconnecting the tubing string from the plug so that the former may be withdrawn from the well bore. In my co-pending application, Serial No. 317,232, filed February 5, 1940, which became Patent No. 2,317,021, issued April 20, 1943, there is disclosed such a means.

Now, it has beenfound that it is desirable to I havea setting tool having means for normally holding the clutch jaws apart, and having means for washing down the various elements of said (7001.

One object, therefore, of this invention is to provide an improved setting tool for well plugs, and the like, having means for disconnecting the plug from the tubing so that the latter may be withdrawn from the well here; and wherein means are provided to allow the cement standing in-the tubing string to flow or drain therefrom.

Another object of the invention is to provide an improved setting tool for well plugs, and the like, wherein means are provided for normally holding the clutching means disengaged so that force must be exertedin order to'engage said clutch.

An important object .of the invention is to provide an improvedsetting tool wherein means are provided for. washing down and'cleansing the various elements of the device along with the tubing, so that any, cement present is flushed away, thereby preventing any such cement from interfering with the operation of the tool, and leaving the tubing free of-cement.

A further object of the invention is to provide an improved setting tool whichmay be utilized to disconnect the tubing from, the well plug in such a manner that only the plug itself is left in the well bore, th'etubing and setting tool being withdrawn in. their entirety.

A still further object of the invention is to provide an improved setting'tool which, when in a washing-down and releasing position, positively prevents any fluid from being pumped into the formation from the conductor connected to said tool, whereby the possibility of contaminating the cementing zone during the washing-down operation is obviated.

An additionalobject of the invention is to provide an improved setting tool which, when used in conjunction with .a well plug having no back pressure valve, may be utilized to form a production packer to producethe well or as a cement retainer, whereby "the tool, along with a well plug, may be lowered into a well bore and the Well started flowing, the well being shut oil it it produces undesirable fluids, such as salt Water or gas, and the tool utilized as a cement retainer to plug the Well bore.

A construction-designed to carryout the invention will-be hereinafter described, together with other features of the invention.

The inventiongwill be more readily understood fromxa reading of the following specification and by reference torthe accompanying drawings, in which an example of the invention is shown, and wherein:

Figure 1 is a longitudinal view, partly in elevation and partly in section, of the upper portion of a setting'tool constructed in accordance with the invention, and showing the tool in a setting position,

Figure 2 is avview, similar'to'Figure 1, and a continuation thereof, showing the lower portion of the setting tool in a setting position,

Figure 3 isa view, partly in elevation and partly in section, showing the upper portion of the setting. tool in a Washing-down and releasing position,

Figure 8 is a horizontal, cross-sectional view taken on the line 8-8 of Figure 3,

Figure 9 is a horizontal, cross-sectional view taken on the line 9-9 of Figure 4,

Figure 10 is an isometric view of a portion of the tool showing the upper set of clutch jaws and one pair of splines,

Figure 11 is a longitudinal view, partly in elevation and partly in section, of the lower portion of a setting tool constructed in accordance with a modification of the invention, and showing the tool in a setting position,

Figure 12 is a longitudinal view, partly in elevation and partly in section, of the lower portion of the setting tool as shown in Figure 11, showing the tool in a washing-down and releasing position,

Figure 13 is a horizontal, cross-sectional view taken on the line |3-|3 of Figure 12,

Figure 14 is a horizontal, cross-sectional view taken on the line |4-|4 of Figure 12,

Figure 15 is a horizontal, cross-sectional view taken on the line l5-l5 of Figure 11,

Figure 16 is a longitudinal view, partly in elevation and partly in section, of the lower portion of a setting tool constructed in accordance with a further or second modification of the invention, and showing the tool in a setting position,

Figure 17 is a longitudinal view, partly in elevation and partly in section, of the lower portion of the setting tool as shown in Figure 16, showing the tool in a washing-down and releasing position, and

Figure 18 is a horizontal, cross-sectional view taken on the line |8-|8 of Figure 17.

In the drawings, the numeral l0 designates a circular head having an internally screw-threaded box formed at the upper end thereof. The head It] is provided with a restricted axial bore |2 which extends downwardly from an internal,

beveled, annular shoulder I3 formed below the box H The outer portion of the head Ill is reduced in diameter at a point spaced from the upper end thereof, so as to form an external annular shoulder l4. The shoulder I4 is recessed so as to extend downwardly and outwardly at an angle and thereby overhang the reduced portion of the head, external screw-threads |5 being provided upon said reduced portion. The outside diameter of the head is further reduced below the threads IE to form a shank l6 and a second shoulder H. For establishing communication between the bore l2 and exterior of the shank IS, a plurality of radial ports |8 are provided in the wall of said shank.

A tubular sleeve |9, having substantially the same outside diameter as the upper portion of the head I0, is provided with an axial bore 20. Internal screw-threads 2| are formed on the upper portion of the bore 20 and enga e the threads l5 formed on the'head In so as to suspend the sleeve therefrom. The upper end 22 of the sleeve is beveled so as to fit into the recessed shoulder 4. The lower portion of the bore 20 is reduced in diameter so as to form an internal annular shoulder 23, while an external. annular boss 24 is provided on the outer side of the sleeve l9 below the horizontal plane of said shoulder. The lower side 25 of the boss 24 is recessed in the same manner as the shoulder I4. External screw-threads 26 are formed upon the lower end of the sleeve below the boss 24.

A tubular mandrel 21 has a sliding fit within the restricted lower portion of the bore 20, and has its upper end reduced and formed with external screw-threads 28. A collar 29 is disposed above the mandrel 21 within the bore 20, and is provided with an axial bore 30 substantially equal in diameter to the bore of said mandrel. The lower portion of the bore 30 is enlarged and carries internal screw-threads 3| so as to engage the screw-threads 28 formed upon the mandrel. As clearly shown in Figures 1 and 3, the collar 29 is of larger outside diameter than the mandrel and rests upon the shoulder 23, thereby supporting the mandrel within the restricted lower portion of the bore 20.

' The collar 29 is provided with a plurality of radial ports 32 which extend from the wall of the bore 3!] to the outer surface of the collar. A vertical groove 33 extends downwardly in the outer surface of the collar from each of the ports 32. The upper portion of the collar 29 is reduced in diameter so as to form an external annular shoulder 34. A bearing ring 35 encircles the reduced portion of the collar and rests upon said shoulder, A helical coil spring 36 is disposed within the bore 20 of the sleeve l9 so as to rest upon the bearing ring 35. The upper end of the spring 36 engages a bearing ring 31 similar to the ring 35, which ring 31, in turn, engages the shoulder formed upon the head H1. Thus, the spring 36 is placed so as to constantly urge the mandrel 21 downwardly with respect. to the sleeve l9, so that the collar 29 engages the shoulder 23.

' An annular recess 38 is formed near the lower end of the wall of the restricted lower portion of the bore 20, and a pressure-seal packing ring 39 is positioned therein. The ring 39 is adapted to seal off the space between the mandrel 2'! and the sleeve I9 against pressures acting both upwardly and downwardly. A plurality of radial ports 49 are provided in the wall of the mandrel near the upper end thereof. While the ports 4|] are shown as circular in the drawing, they may be of any suitable or desirable shape. This statement applies with regard to all the ports provided in the device. The ports 40 are located so as to be above the packing ring 39 when the device is in a setting position, as is shown in Figure 1.

A tubular sleeve 4|, having internal screwthreads 42 formed in its upper end, is secured to the lower end of the sleeve I9 by means of the threads 26. The upper end of the sleeve 4| is beveled so as to fit into snug engagement with the beveled shoulder 25. The sleeve 4| has an outside diameter substantially equal to the :outer diameter of the boss 24 so that a substantially continuous exterior surface is provided. Internal screw-threads 43 are provided on the lower end of the sleeve 4| so as to engage external screw-threads 44 formed upon the upper end of a collar 45, whereby said collar is supported by the sleeve. The collar 45 is enlarged below the threads .4 so as to form an exterior annular shoulder 46, which shoulder abuts the lower nd of the sleeve 4 The lower end of the sleeve is beveled and the shoulder 46 is beveled in a complementary fashion so as to form a snug joint between the colla and the sleeve.

An internal annular flange 4'! is provided at the upper end of the collar 45 and carries internal screw-threads 48'upon its inner surface. A plurality of longitudinal ports 49 are provided in the flange 4! so as to communicate between the spaces above'and below said flange. A tubular member 5!! carries external screwthreads 5| upon itslower end and is mounted above the flange 41 by means of the engagement of said screwthreads with the screw-threads 48. The tubular member 53 is formed with an axial bore 52 of such diamter as to allow the member to have a sliding fit around the mandrel 2?, and extends upwardly from the flange 47 to a point spaced below the lower end of the sleeve i9. An internal, annular recess 53 is formed in the wall of the bore 52 at a point near the lower end of the member 59, and a pressure-seal packing ring 54, similar to the packing ring 39, is disposed in said recess; A pair of internal, annular recesses 55 are also formed, one above the other, near the upper end of 'the member 5! said recesses being similar to the recess 53 and being provided with pressureseal packing rings 55, similar to the packing ring 54 and the packing ring 3%.

A plurality of radial ports 57 are provided in the mandrel 2'! so as to lie between the packing ring 5&- and the packing rings. 55 when the device is in a setting position. as is shown in Figure 1.

The lower end of the collar 45 is reduced in diameter so as to form a beveled shoulder 58, and a plurality of internal splines 59 are spaced about the inner wall of the collar at the lower end thereof. The splines 59 are adapted to engage a plurality of complementary splines 60 formed upon the outer surface of the mandrel 27. In this manner a rotative motion may be imparted to the head I!) and transmittedthrough the sleeve IS, the sleeve 4-1, the collar 45, and the splines 59 and 6%], to the mandrel 27. The advantages of this construction will be pointed out hereinafter. The lower ends of the splines 59, and the upper ends the'splines 60 are inclined, so that said splines will readily mesh when moved toward one another.

The lower reduced end of the collar i5 is cut away in portions so as to form depending clutch:

jaws 6|. The device is shown in the drawings as being provided with two such jaws adapted to transmit right-hand rotation. However, it is to be noted that any desirable number of jaws might be utilized. A similar pair of clutch jaws 62 are disposed on the upper end of a clutch member 63 which encircles the mandrel 27 at a point spaced below the collar 65. The clutch jaws 62 are adapted to mesh with the jaws e! whereby a right-hand rotative movement may be communicated from the collar 55 to the clutch member 63.

As will be noted in the drawings (Figures 2 and 4), the jaws 52 are spaced from the mandrel 21,

whereby an annular space M is provided between said jaws and the mandrel. The clutch member 63 is provided with an axial bore 55 of such diameter to give the member a snug sliding fit upon the mandrel. The bore 65 extends from the lower end of the jaws 62 to the lower end of the clutch member, and is provided with an internal, annular recess 65, carrying a pressureseal packing ring 8], similar to the packing rings ti l-and 56. The outer surface of the clutch member is reduced in diameter intermediate the ends of said member so as'to form anexternal annular shoulder 63 and atubular shank 68. External left-hand screw-threads 69 are :formed upon said shank near the upper end thereof. The shank 58 isfurther reduced at a point spaced below the screw-threads 69 to form an exterior annular shoulder 10.

The mandrel 21 has its lower end disposed near the lower end of the member 63. The lowerend of the mandrel is reduced in diameter and provided with external screw-threads H. Atubular spline member 12', having an internally screwthreaded bore 73 formed in its upper end, is secured to the lower end of the mandrel 2'! by means of the threads H. The spline member 12 has its upper end reduced in diameter to substantially the diameter of the mandrel so as to accommodate the shank 68 of the clutch member 63. The shoulder 74, formed by reducing the upper 'endof the spline member, abuts the lower extremity of the clutch member. An axial bore 15 extends from the bore 13 to the lower end of the splinemember and a plurality of external splines 15 are formed upon the lower portion of the member 12.

A well plug Ti, having an axial bore 18, is disposed beneath the clutch member 63. The plug Tl may be of any suitable type. The device here'- in described is particularly applicable to well plugs such as are disclosed in my co-pending applications, mentioned hereinbefore. The upper end of the bore'l8 is enlarged so as to form an internal annular shoulder l9 which engages the shoulder Til formed upon the clutch member 63. Internal left-hand screw-threads 86 are provided in the enlarged portion of the bore 18 and engage the left-hand screw-threads 69 formed upon said clutch member, whereby the plug is suspended from said member. The clutch member, in turn, is supported by the shoulder 14 of the spline member T2 which is secured to the lower end of the mandrel 21. A plurality of internal splines 8! are formed upon the wall of the bore 18. The splines 8| are engaged by the splines it, whereby rotational movement is transmitted from the spline member E2 to said plug.

The operation of the auxiliary device is positive and eflicient. As the plug TI is lowered into the well bore (not shown), it is suspended from the lower end of the device as has been hereinbefore described. The lower end of the tubing string (not shown) connects into the box ll of the head H} was to support the device and the plug. After the plug has been lowered to the desired location within the well bore, the compressiveforceexerted by the spring 35 will force the device to assume an extended or setting position, as isshown in Figures 1 and 2 of the drawings.

The weight of the plug will coact with the spring 35 in its function to cause the device to assume an extended position. The spring 36 coacts with the plug to force the mandrel 21 downwardly within thesleeves i9 and 4! so as toplace the'device in such'a position. It will be'noted in the drawings that the ports abut the restricted lower portion of the bore 26, and are sealed by means of the packing ring Thus, the ring 39 prevents any fluid from passing through the ports All and downwardly into the space between the mandrel 2'! and the sleeve 4!. The ports 51 are similarly packed off by means of the packing rings 54. and 56 which are positioned respectively below and above said ports;

With the plug and auxiliary device in this positlon, the tubing, which is not shown in the drawings, may be rotated to set the plug. The rotative movement will be transmitted from the tubing to the head I9, and thence through the sleeve I9 to the sleeve M. The movement is then transmitted from the sleeve 4!, through the collar 45, the splines 59 and 69, to the mandrel 21; and from the mandrel, throughthe splines I9 and 8|, to the well plug proper 11, whereby the plug is set within the well bore. Cement may now be pumped down through the tubing, the bore I2 of the head I9, the bore 29 of the sleeve I9, and the bore of the mandrel 21, into the interior of the plug 11, from where it is delivered to the desired location within the well bore.

For the next step in the operation, the tubing string is lowered so that the weight of said tubing rests upon the head I9 of the auxiliary device. This action compresses the spring 36 and causes the sleeves I9'and 4| and the collar 45 to telescope the mandrel 21, so that the splines 59 and 69 are disengaged and the clutch jaws BI and 62 engaged with one another. This position of the device is shown in Figures 3 and 4 of the drawings. It is to be noted that the extremities of the clutch jaws BI and 62 are formed blunt so that the possibility of mismatching the jaws, or jamming the jaws, is eliminated. A suitable washing fluid may now be conducted downwardly through the tubing string so as to enter the bore I2 of the head I9. The washing fluid will pass outwardly through the ports I8 in the shank I6 of the head I9 so as to thoroughly wash and flush the space occupied by the compressed spring 39. The fluid will also pass through the ports 32 and the recess 33 so as 3-2) to wash out the space beneath the collar 29 and above the shoulder 23.

tween the mandrel and the jaws 62 may flow outwardly between the jaws. Thus, the tubing and the auxiliary device are flushed clean of cement and the various elements of the auxiliary device are individually washed and flushed so that further operations are not impeded in any way by the presence of cement. Manifestly, if the operator so desires, the washing-down operation may be conducted in a manner opposite to that described hereinabove. The washing fluid may be conducted downwardly through the well casing (not shown) and upwardly through the well tubing. The two methods are substantially equivalent.

After the washing operation is completed, the next step is the releasing of the auxiliary device from the well plug. Since the plug is now in a set position, and the mandrel 21 is secured thereto, the mandrel may not be rotated. However, the disengagement of the splines 59 and 69 allows the sleeves l9 and M to be rotated while the mandrel remains stationary. For this reason the bearing rings 35 and 31 are provided at the lower and upper ends, respectively, of the helical spring 36. The bearing rings allow the head I9 to be rotated, while the collar 29 remains stationary, without causing the spring 36 to become snarled or entangled in any fashion with other elements of the device. As has been hereinbefore set forth, the splines 59 and 69 are disengaged when the device is in a washing position, and the rotative motion of the sleeve M will not be communicated to the mandrel 21 through the collar 45. Instead, the clutch jaws BI and 62 being engaged, the clutch member 63 will be given a right-hand rotation by the collar 45. This rotation unscrews the left-hand joint formed by the left-hand threads 69 and I9, whereby the auxiliary device is disconnected from the well plug. After the left-hand joint has been broken, the tubing and the auxiliary device may be raised and removed from the well bore. It is to be noted that the spline member 12 will engage the clutch member 63 by means of the shoulder I4 and prevent said member from being left in the well bore. Thus, the entire structure with the exception of the well plug itself is retrieved from the well bore.

In Figures 11 to 15, inclusive, a modification of the invention is disclosed. This form of the invention is very similar to the first form with the exception of the structure below the upper clutch jaws GI. The structure of this modification is identical to the structure of the first form, hereinbefore described, down to the splines 69 which are formed upon the mandrel 21. In the second form, the mandrel is terminated at a point spaced slightly below the splines 99 and is provided with tapered, external screw-threads I99. A shorter mandrel IN is provided with tapered internal screw-threads at its upper end so as to engage the screw-threads I99 of the mandrel 21 and be supported thereby. As will be noted, the mandrel I9I is formed with substantially the same inside and outside diameter as the mandrel 21. The lower end I92 of the mandrel I9I has its edges I93 beveled so as to comprise a valve drop. An axial opening I94 is provided n he lower end I92, and a valve ball I95, disposed within the bore of the mandrel I9I, seats thereupon. A plurality of radial, elongate openings I96 are provided in the mandrel I9I, adjacent the ball I95. A pin I91 extends diametrically across the bore of the mandrel above said openings to limit upward movement of the ball. A tubular spline member I98 surrounds the lower portion of the mandrel II and is provided with inwardly projecting splines II9 upon its inner wall. The splines IE9 'engage external splines I99 formed upon the mandrel I9I above the pin I91. The upper portion of the bore of the member I98 is reduced so as to have a snug sliding fit about the mandrel I9I and to form an internal annular shoulder I98. An annular recess I II is formed in the reduced portion of the bore of the member I98 and a pressure-seal packing ring II2, similar to the rings 54 and 56, is disposed therein. The ring I I2 prevents cement from flowing upwardly past the mandrel during the cementing operation. The splines I99 engage beneath the shoulder I98 so as to support the member I98 and the elements suspended therefrom.

The lower end II3 of the spline member I98 is beveled and internal screw-threads H4 are provided thereupon. A collar II6 has its upper portion reduced with respect to outside diameter and so as to form a shoulder IIl. External screw-threads II8 are provided upon the upper reduced portion of the collar and engage the screwthreads II 4 formed on the lower end of the member I98, whereby the collar is supported therefrom. The shoulder H1 is tapered so as to form a snug joint with the beveled lower end H3 of the spline member. The collar is pro: vided with .an axial bore H9 and has a beveled valve seat I20 formed on its upper end adapted to receive the lower beveled end I03 of. the mandrel IOI.

The lower end of the collar H6 is reduced with respect to inside diameter so as to form a tapered shoulder I 2I and is provided with in: ternal screw-threads I22. A sleeve I23 has ex.- ternal screw-threads I24 formed on its upper end, which threads engage thethreads I22 ofthe collar II6.so as tosupport the sleeve I23 therefrom. The upper end of the sleeve istapered so as to form a tight joint with the tapered seat I21, I25 which forms a continuation of the bore-Hi9. The lower end of the sleeve is provided with an external annular flange I26 which has-its lower face beveled so as to rest upon the upper end of the splines 8|.

An elongate clutch member I21 is disposed in the upper end of the well plug 11 in substantially the same manner as is set forth in thedescription of the first form of the invention, and is secured thereto by means of left-hand threads 528 similar to the left-hand threads 19. The lower end of the member 121 abuts the upper surface of the flange I26. The upper portion of the member I21 is in the form of a sleeve and carries a plurality of radial ports I29. Clutch jaws I311, similar to the jaws-62 of the first form, are formed upon the extreme upper end of the member I21.

In its broad aspects, the operation of this second form of the invention is substantially identical to the operation of the first form. As the device is lowered into the well bore, the well fluid usually present therein will pass upwardly through the opening I04, displacing the ball I95. The pin I61 prevents the ball from traveling too great a distance upwardly through the bore of the mandrel I BI.

In many instances the pressure required to wash down the well bore along with the tubing and auxiliary device, after the cementing operation has been completed, is greater than the pressure required to pump cement into the desired location, due to the fact'that it is necessary to overcome the hydrostatic head of the fluid standing in the well bore above the Well plug. In such a situation the use of ordinary cementing means, or the use of the first form of this invention, would allow the washing-down fluid to enter the area being cemented with the accompanying undesirable results. With the structure disclosed in this modification of the invention, such an occurrence is prevented. When the tubing is lowered so as to place the device in a washing-down and releasing position, the lower end I63 of the mandrel IOI will come to rest upon the seat I26]. At the same time, the ball I will seat upon the opening I04, thereby closing the same. Washing-downfiuid may now be conducted down into the device under any desirable, practical pressure and will bep'ositively prevented from entering into the plug 11 and thence into the cementing zone. This is only one instance of the applicability of this form of the invention. There are other advantageous uses of the same. It is to be noted that there is a slight space between the upper sleeve-like portion of the clutch member I21 and the outside of the spline member I98. This allows washing fluid to pass downwardly through said space and The sleeve is provided with an axial bore out through the p rt I129 as o ush ou any c ment which m y nte n s id pace- In i ur s l a d 1 o h w n s ther i sh wn a h r mo ifica on o t e inv nti n- Thisthirdform of the invention is substantially identical to; the second form hereinbeiore des ribed w h t e xc ion t he pen n fl the ball I05, and thepin I91, are omitted.

In om sianee n e remis t i esirable r n a 1 99 i t h Well 9 rou h which the well may be produced, or which may be used to cement the well. This third form of t e nt o 5 5 Wm lowe ed in he ell b e a n i a w l u a i no ba hp g sure v l A i r th P 11. i et he l ma b flowed t u h th tubing string. lf the Well produces undesirable fluids, cement may be conducted downwardly through the tubing so as to cement on the zone producing undesirable fiu ids n I e ond c d o t e d s r d cat n. the tubing is lowered, thereby bringing the lower end of the mandrel Illi into engagement with the valve seat I28. This operation closes off the bore i25 and the bore of the plug 11,so tha t the equivalent of a back pressure valve is provided.

The closing of the bore i2 5 holds the cement in place within the well bore and formation until it has reached its initial set. After an initial set has been obtained, the auiriliary deviceisreleased from the well plug in thesame'ma nner as the first and second terms of the invention, and withdrawn i -om the well bore. it is t o be noted that the cementing operation may be commenced without withdrawing the tubing from the Well so as tomake alterations or additions to theauxiliary device or the well plug.

Thus, adevice is provided which serves a twofold purpose within the well borefand which performs either function without requirin g .-removal from and re-insertion into the well open? ing, with the accompanying expense and lost 1 time of such an operation. This form operates of the herein described in all other respects in substantially the same mam er as the second form. Well fluid passing upwardly through the device, as the same is lowered into the well bore, flows around the lower end of the mandrel .IDI and through the open} ings I 06, rather than through theopening I M. Aside from the disclosure given hereinbefore, the structure and operation of thethird iorm of the invention issubstantially the same as that set forth in connection with the description .of the second form.

Various changes, alterations and modification's may be made in the size, sha pe and arrangement elements within ithe scope of the appended claims. What I claim and desire ,to secure by Letters Patent is: 'i

l. A well device for .connectinga conductor with a well .tool which is set in the well including, an elongate body having means at its upper' for securing it .to well conductor, an

elongate tubular member movably mounted in the body, means "for renderingsaidmember incapable of rotative .inovemehtrelatiye tiofthe body, Said member being adapted to undergo a limited longitudinal movement. withinsaid body with relationto the body so asto, disengage said second-named means} valve means" disp'qsed 'within t he. deviceand adapted to be engaged by need. The deviceis After the cement 6 in a predetermined longitudinal position with respect to the body, and means connecting said member with the well tool, whereby a rotation of the conductor will rotate the tool through the body and member to permitsetting of said tool inthe wellbore.

2. A well device for connecting a conductor with a well tool which is set in the well including, an elongate body having means at-its upper end for securing itto a well conductor, an elongate tubular member movably mounted in the body, means for rendering said member incapable of rotat've movement relative to the body, said member being adapted to undergo a limited longitudinal movement within said body with relation to the body so as to disengage said second-named means, valve means disposed within the device and adapted to be engaged by said elongate member so as to prevent the flow of fluid into the well tool when said member is in a predetermined longitudinal position with respect to the body, and clutching means disposed between the body and the well tool and arranged to be actuated by the longitudinal movement of the bodynvhereby when the clutching means is engaged a rotation may be imparted to the tool from the conductor and through the body, the body and member having ports therein which are adapted to communicate with each other when the member is in a predetermined longitudinal position with relation to the body, whereby the fluid within the conductor may be drained therefrom through the communicating 'ports.

3. A well device for connecting a conductor with a well tool which is set in the well including, an elongate body having means at its upper end for securing it to a well conductor, an elongate tubular member movably mounted in the body, means for rendering said member incapable of rotative movement relative to the body, said member being adapted to undergo a limited longitudinal movement within said body with relation to the body so as to disengage said second-named means, a back pressure valve seat disposed within the device and adapted to be engaged by said elongate member so as to prevent the flow of fluid into the well tool when said member is in a predetermined longitudinal position with respect, to the body, and means connecting said member with -the well tool, whereby a rotation of the conductor will rotate the tool through the mit setting of said tool in the well bore.

4. A well device for connecting a conductor with a, well tool which is to be set in a well bore including, an elongate body having means at its upper end for securing it to 'a well conductor, an elongate tubular member movably'mounted in the body, means for preventing rotative movement of the member relative to said body, means at the lower end of said member for securing the member in connection with the well tool, whereby rotation of the conductor will rotate said tool by means of the body and member to permit setting of the tool in thewell bore, said body being movable longitudinally with relation to said member so as to disengage the preventing means and permit rotation of the body relative to the member, and means carried by said body for engaging the securing means upon relative longitudinal movement between th body and body and member to per- 'ment of the body relative in the body, and having to itsllower end, means for preventing rotation position of said formed therein which which communicate with each other when said member to release said member for disconnection from said tool by rotation of said body.

5. A well device as set forth in claim 4 wherein the body and member each have spaced ports formed therein which are normally closed and whichcommunicate with each other when said body ismoved longitudinally relative to said member, whereby fluid within the conductor may be drained therefrom through the communicating ports.

6. .Awell device for connecting a conductor with .a well tool which is to be set in a well bore including, an elongate body having means at its upper end for securing it to a well conductor, an elongate tubular member movably mounted in the body, and having the well tool connected to itslower end, means for preventing rotation of the member relative to said body, the body being movable longitudinally relative to said member so as to disengage the preventing means, and co-acting clutch means associated with said body and well tool normally spaced from each other and being engaged by longitudinal moveto the member and tool, whereby rotation may be imparted to said tool from the conductor through said body and member to set the tool when the clutch means is disengaged and the preventing means engaged, the body being rotatable relative to said tool and member to release the device for disconnection from the tool when said clutch means is engaged and said preventing means disengaged.

'7. A well device as set forth in claim 6 wherein the body and member each have spaced ports formed therein which are normally closed and which communicate with each other when said body is moved longitudinally relative to said member, whereby fluid within the conductor may be drained therefrom through the communicating ports.

8. A well device for connecting a conductor with a well tool which is to be set in a well bore including, an elongate body having means at its upper end for securing it to a well conductor, an elongate tubular member movably mounted the well tool connected of the member relative to said body, the body being movable longitudinally relative to said member so as to disengage the preventing means, and co-acting clutch means associated with said body and well tool normally spaced from each other and being engaged by longitudinal movement of the body relative to the member and tool, the clutch means being disengaged in one body to permit rotative movement to be imparted to said tool from the conductor through the body and member and engaged in another position of said body in which the preventing means is disengaged to permit the device and conductor to be released from :the tool through rotation of the body and clutch means by the conductor.

9. A well device as set forth in claim 1 wherein the body and member each have spaced ports are normally closed and body is moved longitudinally relative to said member, whereby fluid within the conductor may be drained therefrom through the communicating ports.

ROSS BASSINGER. 

